Hibernate online training

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What is Hibernate?
• Hibernate is an open source, lightweight, ORM(Object Relational
Mapping) tool.
• It’s a pure java object relational mapping persistence framework that
allows you to map plain old Java objects to relational database tables

Architecture of Hibernate

Example to Create a Hibernate Application in Eclipse
• Create the java project
• Add jar files for hibernate
• Create the Persistent class
• Create the mapping file for Persistent class
• Create the Configuration file
• Create the class that retrieves or stores the persistent object
• Run the application

Create the java project
Open Eclipse IDE---->File Menu----->New---->Project--->
Java Project----> Specify the Project name----->Finish
Add Jar files To Hibernate
 To add the jar files Right click on your project
 Build path
 Add external archives.
 Now select all the jar files

package com.mypackage;
public class Employee {
private int id;
private String fname,lname;
public int getId() {
return id; }
public void setId(int id) {
this.id = id; }
public String getFname() {
return fname; }
public void setFname(String fname) {
this.fname = fname; }
public String getLName() {
return lName; }
public void setLname(String lname) {
this.lname = lname; }
}
Create persistent Class
Employee.java

<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD
3.0//EN"
"http://hibernate.sourceforge.net/hibernate-
mapping-3.0.dtd">
<hibernate-mapping>
<class name="com.mypackage.Employee"
table="emp1000">
<id name="id">
<generator
class="assigned"></generator>
</id>
<property name="fname"></property>
<property name="lname"></property>
</class>
</hibernate-mapping>
Mapping Class
employee.hbm.xml

<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPEhibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
http://hibernate.sourceforge.net/hibernate-
configuration-3.0.dtd">
<hibernate-configuration><session-factory><property
name="hbm2ddl.auto">update</property>
<property
name="dialect">org.hibernate.dialect.Oracle9Dialect
</property> <property
name="connection.url">jdbc:oracle:thin:@localhost:
1521:xe</property> <property
name="connection.username">system</property><p
ropertyname="connection.password">oracle</prope
rty> <property
name="connection.driver_class">oracle.jdbc.driver.O
racleDriver</property> <mapping
resource="employee.hbm.xml"/>
</session-factory> </hibernate-configuration>
configuration Class
hibernate.cfg.xml

• Create a class that retrieves and stores the persistent object
• To run the hibernate application, right click on the StoreData
class - Run As - Java Application.
• Finally run the application
Run Application

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